A method for safe and high-quality production of leafy rapeseed in lightly polluted vegetable fields in cadmium

A technology for rape and vegetable fields, applied in the field of safe and high-quality production of leaf rape, can solve the problems of reducing absorption, reducing crop Cd bioavailability, reducing crop Cd content, etc. Affordable and low-cost effects

Active Publication Date: 2019-10-15
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that increasing the Mn content of crops through the application of Mn fertilizers can not only reduce the Cd content of crops, but also may reduce the bioavailability of Cd in crops and reduce the absorption of Cd in agricultural products by the human body, so as to achieve safe and high-quality production of crops. Protect human health, but research and patents in this area have not yet been reported

Method used

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  • A method for safe and high-quality production of leafy rapeseed in lightly polluted vegetable fields in cadmium
  • A method for safe and high-quality production of leafy rapeseed in lightly polluted vegetable fields in cadmium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Pot experiment of spraying compound foliar conditioner to regulate safe and high-quality production of rapeseed

[0035] The potted experiment site is located in the glass greenhouse of the Environmental Protection Institute of the Ministry of Agriculture, and there are no pollution sources around the site. The soil for the test was collected from the sewage irrigation vegetable field in Dongli District, Tianjin. The soil type is fluvo-aquic soil. The basic physical and chemical properties are: pH 7.88, cation exchange capacity CEC 15.4cmol / kg, organic matter content 2.95%, and total Cd content 2.33mg / kg , is a moderately Cd-polluted soil with a total Mn content of 545mg / kg. Rapeseed cultivar for leaves tested was Zaohuaguan with low cadmium accumulation.

[0036] The compound foliage conditioner used in this test is prepared by the following steps:

[0037] (1) Weigh 15.4, 30.7, 61.5g MnSO respectively 4 ·H 2 O was dissolved in 750ml of water, and then 21.4, 42.8, ...

Embodiment 2

[0048] Field experiment of spraying compound foliar conditioner to control the safe and high-quality production of rapeseed I-Cadmium moderately polluted vegetable field

[0049] The test site is located in the sewage-irrigated vegetable field of Dabizhuang Village, Dongli District, Tianjin. The vegetable field is located in the Beipaihe sewage-irrigated area of ​​Tianjin. Since the 1970s, urban domestic sewage and industrial sewage have been used for irrigation for a long time. The soil and production Vegetables are polluted by heavy metals. The basic physical and chemical properties of the demonstration site soil are as follows: pH value 7.95, CEC 17.3cmol / kg, organic matter content 3.43%, Cd content 2.89mg / kg, Mn content 478mg / kg. According to the national soil environmental quality standard, the vegetable field soil is moderately polluted by cadmium. Rapeseed rape tested included: common variety Hanlu, low cadmium accumulation varieties Zaohuaguan and Kawada Keiko.

[0050...

Embodiment 3

[0069] Field experiment of spraying compound foliar conditioner to control the safe and high-quality production of rapeseed II-Slightly polluted vegetable field with cadmium

[0070] The test site is located in the sewage-irrigated vegetable field of Nanhezhuang Village, Dongli District, Tianjin. The vegetable field is located in the sewage-irrigated area of ​​Beipai River in Tianjin. Since the 1980s, urban domestic sewage and industrial sewage have been used for irrigation for a long time. The soil and production Vegetables are polluted by heavy metals. The basic physical and chemical properties of the demonstration site soil are as follows: pH value 8.38, CEC 18.3cmol / kg, organic matter content 3.21%, Cd content 1.63mg / kg, Mn content 546mg / kg. According to the national soil environmental quality standard, the soil of the vegetable field is mildly polluted by cadmium.

[0071] The tested rape varieties, spraying treatments and methods, rape cultivation management, Cd and Mn ...

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Abstract

The invention discloses a method for carrying out rape safe high-quality production in a cadmium moderate-mild contamination vegetable land. The method includes: planting cadmium low-accumulation leafrape Zaohuakou in the cadmium moderate-mild contamination vegetable land; and spraying the rape with a compound leaf conditioner containing Mn in the middle and later periods of rape growth, performing air humidifying so as to further reduce Cd absorption and accumulation of the rape. The biological availability of the Cd is lowered, Mn absorption and enrichment of the rape is promoted, the biological availability of the Mn is improved, and oil safe high-quality production can be achieved. The method is significantly improve the stability and the absorption efficiency of Mn in the conditioner, and can effectively supply Mn nutriment to the rape; the Cd content and biological availability of the rape can be further reduced by using the compound leaf conditioner and the cadmium low-accumulation leaf rape, the application range of the method is enlarged, and the Mn content and biological availability of the rape can be improved.

Description

technical field [0001] The invention relates to the technical field of safe production of agricultural products, and specifically discloses a method for safe and high-quality production of leaf rapeseed in vegetable fields slightly polluted by cadmium. Background technique [0002] In recent years, my country's soil cadmium (Cd) pollution presents a mild and frequent trend. According to the "National Soil Pollution Survey Bulletin", the excess rate of soil Cd pollution points in my country is as high as 7.0%, ranking first in pollutants, and the proportions of light and light pollution points are 5.2% and 0.8%, respectively. The highly polluted farmland soil needs to be treated urgently. Taking Tianjin as an example, the area of ​​sewage irrigated vegetable land polluted by heavy metals is as high as 10,000 hm 2 , the Cd content of leafy vegetables in the monitoring points exceeds the standard rate as high as 45.0%. Leafy vegetables are an important source of dietary Cd int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/15A01G25/00A01G7/06A01C21/00C05G3/00
CPCA01C21/005A01G7/06A01G25/00C05D9/02C05G3/00C05G5/20C05F11/02Y02P20/133Y02P60/12
Inventor 王林徐应明孙约兵梁学峰黄青青秦旭赵立杰
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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